ScriptSet &ScriptSet::intersect(UScriptCode script, UErrorCode &status) {
ScriptSet t;
t.set(script, status);
if (U_SUCCESS(status)) {
this->intersect(t);
}
return *this;
}
// Computes the augmented script set for a code point, according to UTS 39 section 5.1.
void SpoofImpl::getAugmentedScriptSet(UChar32 codePoint, ScriptSet& result, UErrorCode& status) {
result.resetAll();
result.setScriptExtensions(codePoint, status);
if (U_FAILURE(status)) { return; }
// Section 5.1 step 1
if (result.test(USCRIPT_HAN, status)) {
result.set(USCRIPT_HAN_WITH_BOPOMOFO, status);
result.set(USCRIPT_JAPANESE, status);
result.set(USCRIPT_KOREAN, status);
}
if (result.test(USCRIPT_HIRAGANA, status)) {
result.set(USCRIPT_JAPANESE, status);
}
if (result.test(USCRIPT_KATAKANA, status)) {
result.set(USCRIPT_JAPANESE, status);
}
if (result.test(USCRIPT_HANGUL, status)) {
result.set(USCRIPT_KOREAN, status);
}
if (result.test(USCRIPT_BOPOMOFO, status)) {
result.set(USCRIPT_HAN_WITH_BOPOMOFO, status);
}
// Section 5.1 step 2
if (result.test(USCRIPT_COMMON, status) || result.test(USCRIPT_INHERITED, status)) {
result.setAll();
}
}
IdentifierInfo &IdentifierInfo::setIdentifier(const UnicodeString &identifier, UErrorCode &status) {
if (U_FAILURE(status)) {
return *this;
}
*fIdentifier = identifier;
clear();
ScriptSet scriptsForCP;
UChar32 cp;
for (int32_t i = 0; i < identifier.length(); i += U16_LENGTH(cp)) {
cp = identifier.char32At(i);
// Store a representative character for each kind of decimal digit
if (u_charType(cp) == U_DECIMAL_DIGIT_NUMBER) {
// Just store the zero character as a representative for comparison. Unicode guarantees it is cp - value
fNumerics->add(cp - (UChar32)u_getNumericValue(cp));
}
UScriptCode extensions[500];
int32_t extensionsCount = uscript_getScriptExtensions(cp, extensions, UPRV_LENGTHOF(extensions), &status);
if (U_FAILURE(status)) {
return *this;
}
scriptsForCP.resetAll();
for (int32_t j=0; j<extensionsCount; j++) {
scriptsForCP.set(extensions[j], status);
}
scriptsForCP.reset(USCRIPT_COMMON, status);
scriptsForCP.reset(USCRIPT_INHERITED, status);
switch (scriptsForCP.countMembers()) {
case 0: break;
case 1:
// Single script, record it.
fRequiredScripts->Union(scriptsForCP);
break;
default:
if (!fRequiredScripts->intersects(scriptsForCP)
&& !uhash_geti(fScriptSetSet, &scriptsForCP)) {
// If the set hasn't been added already, add it
// (Add a copy, fScriptSetSet takes ownership of the copy.)
uhash_puti(fScriptSetSet, new ScriptSet(scriptsForCP), 1, &status);
}
break;
}
}
// Now make a final pass through ScriptSetSet to remove alternates that came before singles.
// [Kana], [Kana Hira] => [Kana]
// This is relatively infrequent, so doesn't have to be optimized.
// We also compute any commonalities among the alternates.
if (uhash_count(fScriptSetSet) > 0) {
fCommonAmongAlternates->setAll();
for (int32_t it = UHASH_FIRST;;) {
const UHashElement *nextHashEl = uhash_nextElement(fScriptSetSet, &it);
if (nextHashEl == NULL) {
break;
}
ScriptSet *next = static_cast<ScriptSet *>(nextHashEl->key.pointer);
// [Kana], [Kana Hira] => [Kana]
if (fRequiredScripts->intersects(*next)) {
uhash_removeElement(fScriptSetSet, nextHashEl);
} else {
fCommonAmongAlternates->intersect(*next);
// [[Arab Syrc Thaa]; [Arab Syrc]] => [[Arab Syrc]]
for (int32_t otherIt = UHASH_FIRST;;) {
const UHashElement *otherHashEl = uhash_nextElement(fScriptSetSet, &otherIt);
if (otherHashEl == NULL) {
break;
}
ScriptSet *other = static_cast<ScriptSet *>(otherHashEl->key.pointer);
if (next != other && next->contains(*other)) {
uhash_removeElement(fScriptSetSet, nextHashEl);
break;
}
}
}
}
}
if (uhash_count(fScriptSetSet) == 0) {
fCommonAmongAlternates->resetAll();
}
return *this;
}
